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(No Model.)

G. STEELE.

STEAM BOILER. No. 307,599. Patented NOV. 4, 1884.

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GEORGE STEELE, 0F NEWV YORK, N.

STEAh l BOlLER.

EJPIECIEICATIUI" forming part of Letters Patent No. 307,599, dated November a, 1884.

Application filed February 18, 1854. (No model.)

To ctZZ whom it may concern.-

Be it known that I, GEORGE STEELE, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Steam-Boilers, of which the following is a specification.

My invention relates more particularly to steanrboilers for heating purposes; and an important object of my invention is to provide an effective boiler for such purpose which can be produced at a low cost, and will require but little more care than an ordinary magazinc or self-feeding stove. Certain features of the invention may, however, be embodied in boilers for generating steam for other than heating purposes.

In the accompanying drawings. Figure 1 is a central vertical section of a boiler embodying my invention, and Fig. 2 is a transverse section thereof on the dotted line .r x', Fig. 1.

Similar letters of reference designate corresponding parts in both figures.

AA designate the body ofthe boiler or boiler proper, and B designates a superheater, here shown as arranged above the boiler A A. The boiler AA consists of two cylindric or circular portions of different diameters, the portion A, which is lowermost, being the smaller, and beingjoincd to the upper and larger portion, A, by a horizontallyextending portion or shoulder, a.

O designates the furnace, here shown as' circular and provided with the usual grate, D. The furnace O and the upper portion, 0, of the inclosing-casing or heating-chamber are lined with fire-brick I) Z), and the boiler A A is supported in an upright position by reason of the shoulder a resting on the fire-brick lining 7) of the furnace. The outer casing, 6 0,

is supported on a metal or other base, C and from the upper portion, 0, the smoke-flue 0 extends. Through the vertical center of the boiler and superheater there extends a fuelmagazine or feeding-throat, A B, the lower portion, A, which extends through the boiler A A, being formed integral therewith, and the upper portion, B, being formed integral with the superheater l3 and joined with the portion A at c. The upperportion, G, of the outer casing of the boiler is closed by a top or cover, 0 through which extends the por-.

tion B of the fuel-magazine, and the upper end of said magazine is closed by a lid or cover, (I. I prefer to form the superheater B and its sect-ion B of the magazine integral by casting, and I also may produce the boiler portions A A and the magazine portion A in one piece by casting, as they may he thus cheaply produced.

In the boiler proper are two circular series of vertical fire-tubes, e e, the tubes 6 being arranged in an inner circle and long enough to extend through the two portions A A, and the tubes 6 being arranged in an outer circle and only long enough to extend through the larger portion A, said tubes being secured in the shoulder a. The tubes 6 0' may be eX- panded at the ends into tube-holes prepared for them in the top and bottom of the boiler. The boiler A A is connected with the superheater B by tubesf, which may be provided with right and left hand threads and screwed into said two parts, or which may have along thread at one end and a short thread at the other end. The boiler A A is filled with water up to about the line and the upperpor tion of A and the superheater P constitute the steamspace of the boiler.

In the superheater B are short tubes 9, which are directly over the tubes e e in the b0 ler, and through which a tube-scraper or brush maybe inserted into the tubes 6 e, for the purpose of cleaning them. The tubes 9 may be cast integral with or expanded into the upper and lower plates of the superheater.

I have here represented two circular series of tubes, h h, extending downward from the part A of the boiler, and connected at their lower ends with annular pipes or chambers t i. The tubes h are shorter and are arranged in a smaller circle than the tubes h. Certain of the tubes h h will always be less exposed to the heat than others, and there will therefore always bea downward circulation through certain of the tubes h h and an upward circulation through certain other of the said tubes. Blow-off pipes j j extend from the annular pipes t i, and by opening the valve or blowoff cock j the sediment settling in the pipes it may be blown off. A pipe, it, enters the to the radiators of the heating system, and

pipe Z.

the steam and water of condensation return through the pipe m to the pipe k, and thence flow into the boiler through the coil 70 and The feed-pipe a is or may be connected'with the pipe 7c; but as all the water of condensation in the radiator system is returned to the boiler the quantityof feed-water supplied need be little. Vhen the water of condensation is not returned to the boiler, the

return-pipe m will be unnecessary,and a larger volume of feed-water must be supplied.

The boiler above described is simple in construction and easy of repair. Its heating-surface is of such character and so arranged as to be very effective, both as to economy of fuel and the circulation produced, and the boiler requires very little attention,and is safe in its operation.

to the upper end of the magazine portion A*, i

the tubes f, connecting the superhcater and boiler, the furnace O, supporting the boiler by its shoulder a, and the heat-chamber 0, from which leads the escape-pipe c, and which incloses the portion A of the boiler and the superheater, substantially as herein described.

2. The combination of the boiler consisting of the portions A A, joined by the shoulder a, and constructed with the central fuel-magazine, A and long and short tubes e e, the furnace O, supporting the boiler by its shoulder a, and the heat-chamber C, from which leads the escape-pipe c, substantially as herein described.

3. The combination, with the boiler consisting of the portions A A, magazine A and fire-tubes e e, of the furnace and heat-chamber O 0, containing and supporting the boiler, and the pipe 70, entering the furnace, continuing therein as a coil, is, and terminating in a portion, k entering the boiler, substantially as herein described.

4. The combination, with the boiler A A A and tubes 0 e. of the furnace and heatchamber 0 C, the pipe 70, entering the furnace, continuing therein as a coil, k, and terminating in a portion, 70 entering the partA of the boiler, and the pipe Z, leading from the pipe 70 into the part A of the boiler, substantially as herein described.

5. The combination, with the boiler A A A and its fire-tubes e e, of the furnace and heat-chambers O O, and the circular series of heating-pipes h 71, extending downward from the portion A of the boiler, substantially as herein described.

GEO. STEELE.

lVitnesses:

O. HALL,

MATTH W PoLLooK. 

